diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
index 4a1f224fe..fe21c3b40 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
@@ -89,7 +89,8 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
     override val isInitFinish: Boolean get() = viewModel.isInitFinish
 
     private val mHandler = Handler()
-    private val keepScreenRunnable: Runnable = Runnable { Help.keepScreenOn(window, false) }
+    private val keepScreenRunnable: Runnable =
+        Runnable { ReadBookActivityHelp.keepScreenOn(window, false) }
     private val autoPageRunnable: Runnable = Runnable { autoPagePlus() }
     override var autoPageProgress = 0
     override var isAutoPage = false
@@ -100,12 +101,12 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
 
     override fun onCreate(savedInstanceState: Bundle?) {
         ReadBook.msg = null
-        Help.setOrientation(this)
+        ReadBookActivityHelp.setOrientation(this)
         super.onCreate(savedInstanceState)
     }
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        Help.upLayoutInDisplayCutoutMode(window)
+        ReadBookActivityHelp.upLayoutInDisplayCutoutMode(window)
         initView()
         upScreenTimeOut()
         ReadBook.callBack = this
@@ -248,8 +249,8 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
                     viewModel.refreshContent(it)
                 }
             }
-            R.id.menu_download -> Help.showDownloadDialog(this)
-            R.id.menu_add_bookmark -> Help.showBookMark(this)
+            R.id.menu_download -> ReadBookActivityHelp.showDownloadDialog(this)
+            R.id.menu_add_bookmark -> ReadBookActivityHelp.showBookMark(this)
             R.id.menu_copy_text ->
                 TextDialog.show(supportFragmentManager, ReadBook.curTextChapter?.getContent())
             R.id.menu_update_toc -> ReadBook.book?.let {
@@ -276,7 +277,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
                     Pair("loginUrl", it.loginUrl)
                 )
             }
-            R.id.menu_set_charset -> Help.showCharsetConfig(this)
+            R.id.menu_set_charset -> ReadBookActivityHelp.showCharsetConfig(this)
         }
         return super.onCompatOptionsItemSelected(item)
     }
@@ -693,7 +694,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
      * 更新状态栏,导航栏
      */
     override fun upSystemUiVisibility() {
-        Help.upSystemUiVisibility(window, !read_menu.isVisible)
+        ReadBookActivityHelp.upSystemUiVisibility(window, !read_menu.isVisible)
         upNavigationBarColor()
     }
 
@@ -854,16 +855,16 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
      */
     override fun screenOffTimerStart() {
         if (screenTimeOut < 0) {
-            Help.keepScreenOn(window, true)
+            ReadBookActivityHelp.keepScreenOn(window, true)
             return
         }
         val t = screenTimeOut - sysScreenOffTime
         if (t > 0) {
             mHandler.removeCallbacks(keepScreenRunnable)
-            Help.keepScreenOn(window, true)
+            ReadBookActivityHelp.keepScreenOn(window, true)
             mHandler.postDelayed(keepScreenRunnable, screenTimeOut)
         } else {
-            Help.keepScreenOn(window, false)
+            ReadBookActivityHelp.keepScreenOn(window, false)
         }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/book/read/Help.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivityHelp.kt
similarity index 87%
rename from app/src/main/java/io/legado/app/ui/book/read/Help.kt
rename to app/src/main/java/io/legado/app/ui/book/read/ReadBookActivityHelp.kt
index 6a6a59912..558975cba 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/Help.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivityHelp.kt
@@ -6,8 +6,10 @@ import android.content.Context
 import android.content.pm.ActivityInfo
 import android.os.AsyncTask
 import android.os.Build
-import android.view.*
-import android.view.View.NO_ID
+import android.view.LayoutInflater
+import android.view.View
+import android.view.Window
+import android.view.WindowManager
 import android.widget.EditText
 import io.legado.app.App
 import io.legado.app.R
@@ -28,9 +30,8 @@ import kotlinx.android.synthetic.main.dialog_edit_text.view.*
 import org.jetbrains.anko.layoutInflater
 
 
-object Help {
+object ReadBookActivityHelp {
 
-    private const val NAVIGATION = "navigationBarBackground"
 
     /**
      * 更新状态栏,导航栏
@@ -76,28 +77,6 @@ object Help {
     }
 
 
-    /**
-     * 返回NavigationBar是否存在
-     * 该方法需要在View完全被绘制出来之后调用，否则判断不了
-     * 在比如 onWindowFocusChanged（）方法中可以得到正确的结果
-     */
-    fun isNavigationBarExist(activity: Activity?): Boolean {
-        activity?.let {
-            val vp = it.window.decorView as? ViewGroup
-            if (vp != null) {
-                for (i in 0 until vp.childCount) {
-                    vp.getChildAt(i).context.packageName
-                    if (vp.getChildAt(i).id != NO_ID
-                        && NAVIGATION == activity.resources.getResourceEntryName(vp.getChildAt(i).id)
-                    ) {
-                        return true
-                    }
-                }
-            }
-        }
-        return false
-    }
-
     /**
      * 保持亮屏
      */
diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadMenu.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadMenu.kt
index 8dd04832e..6d069ff68 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadMenu.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadMenu.kt
@@ -239,7 +239,9 @@ class ReadMenu : FrameLayout {
                 vw_menu_bg.onClick { runMenuOut() }
                 vwNavigationBar.layoutParams = vwNavigationBar.layoutParams.apply {
                     height =
-                        if (ReadBookConfig.hideNavigationBar && Help.isNavigationBarExist(activity))
+                        if (ReadBookConfig.hideNavigationBar
+                            && SystemUtils.isNavigationBarExist(activity)
+                        )
                             context.navigationBarHeight
                         else 0
                 }
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt
index eaaf2f4d4..c4dd34127 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt
@@ -23,7 +23,7 @@ import io.legado.app.help.ImageLoader
 import io.legado.app.help.ReadBookConfig
 import io.legado.app.help.permission.Permissions
 import io.legado.app.help.permission.PermissionsCompat
-import io.legado.app.ui.book.read.Help
+import io.legado.app.ui.book.read.ReadBookActivityHelp
 import io.legado.app.utils.*
 import kotlinx.android.synthetic.main.dialog_read_bg_text.*
 import kotlinx.android.synthetic.main.item_bg_image.view.*
@@ -100,7 +100,7 @@ class BgTextConfigDialog : BaseDialogFragment() {
             if (buttonView?.isPressed == true) {
                 setStatusIconDark(isChecked)
                 activity?.window?.let {
-                    Help.upSystemUiVisibility(it)
+                    ReadBookActivityHelp.upSystemUiVisibility(it)
                 }
             }
         }
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/MoreConfigDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/MoreConfigDialog.kt
index 1e7aa8d1c..4a3b4bd23 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/MoreConfigDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/MoreConfigDialog.kt
@@ -15,7 +15,7 @@ import io.legado.app.constant.PreferKey
 import io.legado.app.help.ReadBookConfig
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.bottomBackground
-import io.legado.app.ui.book.read.Help
+import io.legado.app.ui.book.read.ReadBookActivityHelp
 import io.legado.app.utils.dp
 import io.legado.app.utils.getPrefBoolean
 import io.legado.app.utils.postEvent
@@ -107,7 +107,7 @@ class MoreConfigDialog : DialogFragment() {
                 PreferKey.textSelectAble -> postEvent(key, getPrefBoolean(key))
                 getString(R.string.pk_requested_direction) -> {
                     activity?.let {
-                        Help.setOrientation(it)
+                        ReadBookActivityHelp.setOrientation(it)
                     }
                 }
                 PreferKey.textFullJustify,
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/TipConfigDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/TipConfigDialog.kt
index 2a6f414cb..325279977 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/TipConfigDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/TipConfigDialog.kt
@@ -10,7 +10,7 @@ import io.legado.app.base.BaseDialogFragment
 import io.legado.app.constant.EventBus
 import io.legado.app.help.ReadTipConfig
 import io.legado.app.lib.dialogs.selector
-import io.legado.app.ui.book.read.Help
+import io.legado.app.ui.book.read.ReadBookActivityHelp
 import io.legado.app.utils.postEvent
 import kotlinx.android.synthetic.main.dialog_tip_config.*
 import org.jetbrains.anko.sdk27.listeners.onCheckedChange
@@ -25,7 +25,7 @@ class TipConfigDialog : BaseDialogFragment() {
             it.windowManager?.defaultDisplay?.getMetrics(dm)
         }
         dialog?.window?.let {
-            Help.upSystemUiVisibility(it)
+            ReadBookActivityHelp.upSystemUiVisibility(it)
             it.setLayout(ViewGroup.LayoutParams.MATCH_PARENT,
                 ViewGroup.LayoutParams.WRAP_CONTENT)
         }
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/HorizontalPageDelegate.kt b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/HorizontalPageDelegate.kt
index 3ce2dce01..9aa807cb8 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/HorizontalPageDelegate.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/HorizontalPageDelegate.kt
@@ -101,8 +101,13 @@ abstract class HorizontalPageDelegate(pageView: PageView) : PageDelegate(pageVie
     override fun abortAnim() {
         if (!scroller.isFinished) {
             scroller.abortAnimation()
-            onAnimStop()
-            stopScroll()
+            isStarted = false
+            isMoved = false
+            isRunning = false
+            if (!isCancel) {
+                pageView.fillPage(mDirection)
+                pageView.invalidate()
+            }
         }
     }
 
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/PageDelegate.kt b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/PageDelegate.kt
index 21dc78dcd..62ec34923 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/PageDelegate.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/PageDelegate.kt
@@ -50,7 +50,7 @@ abstract class PageDelegate(protected val pageView: PageView) {
     var mDirection = Direction.NONE
     var isCancel = false
     var isRunning = false
-    private var isStarted = false
+    var isStarted = false
 
     private var selectedOnDown = false
 
diff --git a/app/src/main/java/io/legado/app/utils/SystemUtils.kt b/app/src/main/java/io/legado/app/utils/SystemUtils.kt
index c29381bbf..b8027528d 100644
--- a/app/src/main/java/io/legado/app/utils/SystemUtils.kt
+++ b/app/src/main/java/io/legado/app/utils/SystemUtils.kt
@@ -8,11 +8,15 @@ import android.content.Intent
 import android.net.Uri
 import android.os.PowerManager
 import android.provider.Settings
+import android.view.View
+import android.view.ViewGroup
 
 
 @Suppress("unused")
 object SystemUtils {
 
+    private const val NAVIGATION = "navigationBarBackground"
+
     fun getScreenOffTime(context: Context): Int {
         var screenOffTime = 0
         try {
@@ -44,4 +48,26 @@ object SystemUtils {
 
         }
     }
+
+    /**
+     * 返回NavigationBar是否存在
+     * 该方法需要在View完全被绘制出来之后调用，否则判断不了
+     * 在比如 onWindowFocusChanged（）方法中可以得到正确的结果
+     */
+    fun isNavigationBarExist(activity: Activity?): Boolean {
+        activity?.let {
+            val vp = it.window.decorView as? ViewGroup
+            if (vp != null) {
+                for (i in 0 until vp.childCount) {
+                    vp.getChildAt(i).context.packageName
+                    if (vp.getChildAt(i).id != View.NO_ID
+                        && NAVIGATION == activity.resources.getResourceEntryName(vp.getChildAt(i).id)
+                    ) {
+                        return true
+                    }
+                }
+            }
+        }
+        return false
+    }
 }